In a matter of weeks, fidget spinners went from something almost nobody had ever heard of to the must-have toy of the season. The anxiety-reducing handheld spinners are so ubiquitous that dozens of ...

[kida] has a highly innovative set of 3D-printable, musical fidget toys that play classic video game tunes. Of course there’s the classic Super Mario ditty, but there’s loads more. How they work is ...